Drools 5.0 入門 3C　(優先度)

import java.util.Collection;

import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.definition.KnowledgePackage;
import org.drools.event.rule.DebugAgendaEventListener;
import org.drools.event.rule.DebugWorkingMemoryEventListener;
import org.drools.io.ResourceFactory;
import org.drools.logger.KnowledgeRuntimeLogger;
import org.drools.logger.KnowledgeRuntimeLoggerFactory;
import org.drools.runtime.StatefulKnowledgeSession;

/**
 * This is a sample file to launch a rule package from a rule source file.
 */
public class DroolsTest2 {

    public static final void main(final String[] args) throws Exception {
        final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory
                .newKnowledgeBuilder();

        // ルールファイルをコンパイルしてKnowledgeBuilderへ追加する
        kbuilder.add(ResourceFactory.newClassPathResource(“DroolsTest2.drl”,
                DroolsTest1.class), ResourceType.DRL);

        // 上記コンパイル時のエラー処理
        if (kbuilder.hasErrors()) {
            System.out.println(kbuilder.getErrors().toString());
            throw new RuntimeException(“Unable to compile \”DroolsTest2.drl\”.”);
        }

        // KnowledgeBuilderからコンパイル済みのパッケージを取得する
        final Collection<KnowledgePackage> pkgs = kbuilder
                .getKnowledgePackages();

        // 取得したパッケージをKnowledgebaseに追加する(パッケージのデプロイ)
        final KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages(pkgs);

        //　Statefulセッションを作成
        final StatefulKnowledgeSession ksession = kbase
                .newStatefulKnowledgeSession();

        // Agenda,WorkingMemoryのView表示準備
        ksession.addEventListener(new DebugAgendaEventListener());
        ksession.addEventListener(new DebugWorkingMemoryEventListener());

        // Auditログのセット
        KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory
                .newFileLogger(ksession, “log/DroolsTest2”);

        // ルールの実行
        final Sales sale = new Sales(12000, Sales.NOT_APPLIED, Sales.MEMBER);
       
        ksession.insert(sale);
        ksession.fireAllRules();

        //　Auditログを閉じる
        logger.close();

        //　Statefulセッションなので、実行が終わったところでdisposeして領域を開放する
        ksession.dispose();
    }

        private long sales;   //　売り上げ
        private int status;   //　状態(未適用、適用済)
        private int member;   // 会員

        public Sales(long sales,
                     int status,
                     int member) {
            this.sales = sales;
            this.status = status;
            this.member = member;
        }

        public int getStatus() {
            return this.status;
        }

        public void setStatus(int status) {
            this.status = status;
        }

        public void setSales(long sales) {
            this.sales = sales;
        }

        public long getSales() {
            return sales;
        }

        public int getMember() {
            return member;
        }

        public void setMember(int member) {
            this.member = member;
        }

    }

}

import jp.co.iluminado.example.DroolsTest2.Sales;

rule “Discount1”
    when
        $s : Sales( status == Sales.NOT_APPLIED,
                    $salesValue : sales,
                    member == Sales.MEMBER )
    then
        $s.setSales((long) ($salesValue * 0.95));
        $s.setStatus(Sales.APPLIED);
        update( $s );
        System.out.println( “Discount1 rule fired” );
end

rule “Discount2”
    when
        $s : Sales( status == Sales.NOT_APPLIED,
              $salesValue : sales >= 5000 )
    then
        $s.setSales($salesValue – 500);
        $s.setStatus(Sales.APPLIED);
        update( $s );
        System.out.println( “Discount2 rule fired” );
end

rule “Printout”
    when
        $s : Sales( status == Sales.APPLIED)
    then
        System.out.println(  $s.getSales() );
        System.out.println( “Printout rule fired” );
end

import jp.co.iluminado.example.DroolsTest2.Sales;

rule “Discount1”
    salience 100
    when
        $s : Sales( status == Sales.NOT_APPLIED,
                    $salesValue : sales,
                    member == Sales.MEMBER )
    then
        $s.setSales((long) ($salesValue * 0.95));
        $s.setStatus(Sales.APPLIED);
        update( $s );
        System.out.println( “Discount1 rule fired” );
end

rule “Discount2”
    salience 50
    when
        $s : Sales( status == Sales.NOT_APPLIED,
              $salesValue : sales >= 5000 )
    then
        $s.setSales($salesValue – 500);
        $s.setStatus(Sales.APPLIED);
        update( $s );
        System.out.println( “Discount2 rule fired” );
end

rule “Printout”
    when
        $s : Sales( status == Sales.APPLIED)
    then
        System.out.println(  $s.getSales() );
        System.out.println( “Printout rule fired” );
end